CIESC Journal

• 化工学报 • 上一篇    下一篇

气体水合物生成机理和热力学模型的建立

陈光进,马庆兰,郭天民   

  1. 石油大学流体高压相态及物性研究实验室!北京102200,石油大学流体高压相态及物性研究实验室!北京102200,石油大学流体高压相态及物性研究实验室!北京102200
  • 出版日期:2000-10-25 发布日期:2000-10-25

A NEW MECHANISM FOR HYDRATE FORMATION AND DEVELOPMENT OF THERMODYNAMIC MODEL

Chen Guangjin , Ma Qinglan and Guo Tianmin (Research Laboratory of High Pressure Fluid Phase Behavior and Property ,University of Petroleum, Beijing 102200)   

  • Online:2000-10-25 Published:2000-10-25

摘要: 提出了一个双过程水合物成核动力学机理模型 :(1 )拟化学过程生成基础水合物 ;(2 )小分子气体在基础水合物中的拟Langmuir吸附形成化学组成不恒定的水合物 .以此机理模型为基础建立了水合物热力学模型 .大量检验结果表明 ,新模型在预测气体水合物 (特别是由很复杂的天然气、凝析气和原油生成的水合物 )生成条件方面优于传统的vanderWaals -Platteeuw(vdW -P)模型及其改进型 ,且计算方法更简单 .

Abstract: A double-process hydrate initiation mechanism is proposed for gas hydrate formation: ①?a quasi-chemical reaction process to form basic hydrate and ② an adsorption process of smaller gas molecules in linked cavities existing in basic hydrate, causing the entire hydrate nonstoichiometric. Based on this new mechanism, a thermodynamic model has been developed. Extensive test results indicate that the new model is superior to the traditional van der Waals-Platteeuw typed models and adequate for predicting the hydrate formation conditions even for complex fluid mixtures, such as natural gas, gas condensate and crude oil.

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